package com.atguigu.educenter.controller;

import com.atguigu.commonutils.JwtUtils;
import com.atguigu.commonutils.R;
import com.atguigu.educenter.entity.UcenterMember;
import com.atguigu.educenter.service.UcenterMemberService;
import com.atguigu.educenter.utils.ConstantWxUtils;
import com.atguigu.educenter.utils.HttpClientUtils;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.google.gson.Gson;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.net.URLEncoder;
import java.util.HashMap;
//
//@CrossOrigin
//@Controller
@RequestMapping("/api/ucenter/wx")
public class WxApiController {
    @Autowired
    private UcenterMemberService memberService;
    //2获取扫描人信息，添加数据
    @GetMapping("callback")
    public String callback(String code,String state){
        try {
            //1、得到授权临时票据code

            //2、拿着code请求 微信的固定地址，得到两个值access_token和openid
            String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                    "?appid=%s" +
                    "&secret=%s" +
                    "&code=%s" +
                    "&grant_type=authorization_code";

            String accessTokenUrl = String.format(
                    baseAccessTokenUrl,
                    ConstantWxUtils.WX_OPEN_APP_ID,
                    ConstantWxUtils.WX_OPEN_APP_SECRET,
                    code);
            //请求这个拼接好的地址，得到返回两个值access_token和openid
            //使用httpclient发送请求，得到返回结果
            String accessTokenInfo = HttpClientUtils.get(accessTokenUrl);
            //从accessTokenInfo字符串获取出来两个值accesstoken和openid
//            把accessTokenInfo转换城map集合，根据map里面key获取对应值
            Gson gson = new Gson();
            HashMap mapAccessToken = gson.fromJson(accessTokenInfo, HashMap.class);
            String access_token =(String) mapAccessToken.get("access_token");
            String openid = (String)mapAccessToken.get("openid");


            //把这个扫描人信息添加到数据库里面
            //判断数据表里面是否存在相同微信信息，根据openid判断
            UcenterMember member =memberService.getOpenIdMember(openid);
            if (member==null){//如果为空表示表没有相同的数据，进行添加
                //3拿着得到access_token和openid，再去请求微信提供固定的地址，获取到扫描人信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";

                String userInfoUrl=String.format(
                        baseUserInfoUrl,
                        access_token,
                        openid
                );

                //发送请求
                String userInfo = HttpClientUtils.get(userInfoUrl);
                //获取返回userinfo字符串扫描人信息
                HashMap userInfomap = gson.fromJson(userInfo, HashMap.class);
                String nickname =(String) userInfomap.get("nickname");
                String headimgurl = (String)userInfomap.get("headimgurl");
                 member = new UcenterMember();
                 member.setOpenid(openid);
                 member.setNickname(nickname);
                 member.setAvatar(headimgurl);
                 memberService.save(member);
            }
            //使用jwt根据member对象生成token字符串
            String token = JwtUtils.getJwtToken(member.getId(), member.getNickname());
            //返回首页面，通过路径传递token


            return "redirect:http://localhost:3000?token="+token;
        }catch (Exception e){
                throw  new GuliException(20001,"登陆失败");
        }

    }
    //1生成微信扫描二维码
    @GetMapping("login")
    public String getWxCode(){
//        //固定地址，后面拼接参数
//        String url=" https://open.weixin.qq.com/connect/qrconnect?appid="+ ConstantWxUtils.WX_OPEN_APP_ID+"&response_type=code";
        //微信开放平台授权baseurl %s相当于？代表占位符
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";

        //对redirect——
        String redirectUrl = ConstantWxUtils.WX_OPEN_REDIRECT_URL;

        try{
            String encode = URLEncoder.encode(redirectUrl, "UTF-8");
        }catch (Exception e){

        }


        //设置%s里面的值
        String url=String.format(
                baseUrl,
                ConstantWxUtils.WX_OPEN_APP_ID,
                redirectUrl,
                "atguigu"
        );


        //重定向到请求微信地址
        return "redirect:"+url;
    }
}
